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The Implication of Land-Use/Land-Cover Change for the Declining Soil Erosion Risk in the Three Gorges Reservoir Region, China

Author

Listed:
  • Jinzhu Jiu

    (School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China)

  • Hongjuan Wu

    (School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China)

  • Sen Li

    (School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
    Centre for Ecology & Hydrology, Wallingford OX10 8BB, UK
    Environmental Change Institute, University of Oxford, Oxford OX1 3QY, UK)

Abstract

The Three Gorges Reservoir Region (TGRR) in China is an ecologically and politically important region experiencing rapid land use/cover changes and prone to many environment hazards related to soil erosion. In the present study, we: (1) estimated recent changes in the risk pattern of soil erosion in the TGRR, (2) analysed how the changes in soil erosion risks could be associated with land use and land cover change, and (3) examined whether the interactions between urbanisation and natural resource management practices may exert impacts on the risks. Our results indicated a declining trend of soil erosion risk from 14.7 × 10 6 t in 2000 to 1.10 × 10 6 t in 2015, with the most risky areas being in the central and north TGRR. Increase in the water surface of the Yangtze River (by 61.8%, as a consequence of water level rise following the construction of the Three Gorges Dam), was found to be negatively associated with soil erosion risk. Afforestation (with measured increase in forest extent by 690 km 2 and improvement of NDVI by 8.2%) in the TGRR was associated with positive soil erosion risk mitigation. An interaction between urbanisation (urban extant increased by 300 km 2 ) and vegetation diversification (decreased by 0.01) was identified, through which the effect of vegetation diversification on soil erosion risk was negative in areas having lower urbanisation rates only. Our results highlight the importance of prioritising cross-sectoral policies on soil conservation to balance the trade-offs between urbanisation and natural resource management.

Suggested Citation

  • Jinzhu Jiu & Hongjuan Wu & Sen Li, 2019. "The Implication of Land-Use/Land-Cover Change for the Declining Soil Erosion Risk in the Three Gorges Reservoir Region, China," IJERPH, MDPI, vol. 16(10), pages 1-16, May.
    • Handle: RePEc:gam:jijerp:v:16:y:2019:i:10:p:1856-:d:234397
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    References listed on IDEAS

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    1. Lufafa, A. & Tenywa, M. M. & Isabirye, M. & Majaliwa, M. J. G. & Woomer, P. L., 2003. "Prediction of soil erosion in a Lake Victoria basin catchment using a GIS-based Universal Soil Loss model," Agricultural Systems, Elsevier, vol. 76(3), pages 883-894, June.
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    3. L. Zhang & Ke Bai & Man Wang & R. Karthikeyan, 2016. "Basin-scale spatial soil erosion variability: Pingshuo opencast mine site in Shanxi Province, Loess Plateau of China," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 80(2), pages 1213-1230, January.
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    Cited by:

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    2. Huang, Chunbo & Zhao, Dengyue & Liao, Qipeng & Xiao, Mingzhu, 2023. "Linking landscape dynamics to the relationship between water purification and soil retention," Ecosystem Services, Elsevier, vol. 59(C).
    3. Haibo Zhang & Jianjun Zhang & Shouhong Zhang & Chunxue Yu & Ruoxiu Sun & Dandan Wang & Chunzhu Zhu & Jianan Zhang, 2020. "Identification of Priority Areas for Soil and Water Conservation Planning Based on Multi-Criteria Decision Analysis Using Choquet Integral," IJERPH, MDPI, vol. 17(4), pages 1-22, February.

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